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muck-up day

(AU, informal) The final day of the senior school year, when departing pupils sometimes play pranks.

ˈmʌˌkʌp ˈdeɪ45 viewsLast reviewed Jun 29, 2026+ Add a definition
🇦🇺 Australian & NZ slang
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Australia
#1·Apr 27, 2026AUS

(AU, informal) The final day of the senior school year, when departing pupils sometimes play pranks.

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🇦🇺About Australian & NZ slang slang

Aussie and Kiwi vocabulary — bogan, daggy, brekkie, sheila, bach, jandals — the whole Antipodean lexicon, including outback dialect, surf and beach culture, and Sydney/Melbourne street slang.

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